package org.android;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;

public class StartingWindow extends Activity {
	// Debugging
	private static final String TAG = "DeviceListActivity";
	private static final boolean D = true;

	// Return Intent extra
	public static String EXTRA_DEVICE_ADDRESS = "device_address";
	private TextView tv;;
	// Member fields
	private BluetoothAdapter mBtAdapter;
	private ArrayAdapter<String> mNewDevicesArrayAdapter;
	private List<BluetoothDevice> mBluetoothDevices;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		this.mBluetoothDevices = new ArrayList<BluetoothDevice>();
		setupTheWindow();
		
		initializeDiscoveryButton();
		
		initializeListView();
		
		// Register for broadcasts when a device is discovered
		IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
		this.registerReceiver(mReceiver, filter);

		// Register for broadcasts when discovery has finished
		filter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
		this.registerReceiver(mReceiver, filter);

		// Get the local Bluetooth adapter
		mBtAdapter = BluetoothAdapter.getDefaultAdapter();

	}
	
	private void setupTheWindow(){
		requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
		setContentView(R.layout.device_list);
		tv = new TextView(this);
		setResult(Activity.RESULT_CANCELED);
	}
	
	private void initializeDiscoveryButton(){
		Button scanButton = (Button) findViewById(R.id.button_scan);
		scanButton.setOnClickListener(new OnClickListener() {
			public void onClick(View v) {
				mNewDevicesArrayAdapter.clear();
				doDiscovery();
			}
		});
	}
	
	private void initializeListView(){
		mNewDevicesArrayAdapter = new ArrayAdapter<String>(this,
				R.layout.device_name);
		ListView newDevicesListView = (ListView) findViewById(R.id.new_devices);
		newDevicesListView.setAdapter(mNewDevicesArrayAdapter);
		newDevicesListView.setOnItemClickListener(mDeviceClickListener);
	}

	@Override
	protected void onDestroy() {
		super.onDestroy();

		// Make sure we're not doing discovery anymore
		if (mBtAdapter != null) {
			mBtAdapter.cancelDiscovery();
		}

		// Unregister broadcast listeners
		this.unregisterReceiver(mReceiver);
	}

	/**
	 * Start device discover with the BluetoothAdapter
	 */
	private void doDiscovery() {
		if (D)
			Log.d(TAG, "doDiscovery()");
		BluetoothAdapter mBluetoothAdapter = BluetoothAdapter
				.getDefaultAdapter();
		if (mBluetoothAdapter == null) {
			tv.setText(R.string.not_support_bluetooth);
		}

		if (!mBluetoothAdapter.isEnabled()) {
			Intent enableBtIntent = new Intent(
					BluetoothAdapter.ACTION_REQUEST_ENABLE);
			startActivityForResult(enableBtIntent, 1);
		}
		
		// Indicate scanning in the title
		setProgressBarIndeterminateVisibility(true);
		setTitle(R.string.scanning);

		// Turn on sub-title for new devices
		findViewById(R.id.title_new_devices).setVisibility(View.VISIBLE);

		// If we're already discovering, stop it
		if (mBtAdapter.isDiscovering()) {
			mBtAdapter.cancelDiscovery();
		}

		// Request discover from BluetoothAdapter
		mBtAdapter.startDiscovery();
	}

	// The on-click listener for all devices in the ListViews
	private OnItemClickListener mDeviceClickListener = new OnItemClickListener() {
		public void onItemClick(AdapterView<?> av, View v, int arg2, long arg3) {
			// Cancel discovery because it's costly and we're about to connect
			mBtAdapter.cancelDiscovery();

			// Get the device MAC address, which is the last 17 chars in the
			// View
			String info = ((TextView) v).getText().toString();
			String address = info.substring(info.length() - 17);

			// Create the result Intent and include the MAC address
			Intent intent = new Intent();
			intent.putExtra(EXTRA_DEVICE_ADDRESS, address);
			BluetoothDevice _device = null;
			for(BluetoothDevice device : mBluetoothDevices ){
				if(device.getAddress().equals(address)){
					_device = device;
				}
			}
			// Set result and finish this Activity
			tv.setText(_device.getName() + " "+_device.getAddress());
			Thread t = new ConnectThread(_device,mBtAdapter);
			t.start();
			try {
				t.join();
			} catch (InterruptedException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			setContentView(tv);
			// setResult(Activity.RESULT_OK, intent);
			// finish();
		}
	};

	// The BroadcastReceiver that listens for discovered devices and
	// changes the title when discovery is finished
	private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
		@Override
		public void onReceive(Context context, Intent intent) {
			String action = intent.getAction();

			// When discovery finds a device
			if (BluetoothDevice.ACTION_FOUND.equals(action)) {
				// Get the BluetoothDevice object from the Intent
				BluetoothDevice device = intent
						.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
				mBluetoothDevices.add(device);
				mNewDevicesArrayAdapter.add(device.getName() + "\n"
						+ device.getAddress());
				// }
				// When discovery is finished, change the Activity title
			} else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED
					.equals(action)) {
				setProgressBarIndeterminateVisibility(false);
				setTitle(R.string.select_device);
				if (mNewDevicesArrayAdapter.getCount() == 0) {
					String noDevices = getResources().getText(
							R.string.none_found).toString();
					mNewDevicesArrayAdapter.add(noDevices);
				}
			}
		}
	};

}
